Hypersensitivity to Vitamins

"Vitamins are heterogenous bioactive substances required by the human body for its healthy functioning. Vitamins are required through a diet as they are normally not produced by the body. Their deficiency may lead to the development of diseases like scurvy, rickets, pellagra, beri-beri and many others. Vitamins have also been produced synthetically and used in supplements. However, they may induce hypersensitivity reactions, ranging from an allergic contact dermatitis to, urticaria as well as li